Camera interpolation at 16 mpx on Android. Digital image interpolation. What is camera interpolation
The mobile phone market is filled with models with cameras with huge resolutions. There are even relatively inexpensive smartphones with sensors with a resolution of 16-20 megapixels. An unknowing buyer is chasing a “cool” camera and prefers the phone with a higher camera resolution. He doesn’t even realize that he is falling for the bait of marketers and sellers.
What is permission?
Camera resolution is a parameter that indicates the final size of the image. It only determines how large the resulting image will be, that is, its width and height in pixels. Important: the picture quality does not change. The photo may turn out to be of low quality, but large due to the resolution.
Resolution does not affect quality. It was impossible not to mention this in the context of smartphone camera interpolation. Now you can get straight to the point.
What is camera interpolation in a phone?
Camera interpolation is an artificial increase in image resolution. It is images, and not That is, this is special software, thanks to which an image with a resolution of 8 megapixels is interpolated to 13 megapixels or more (or less).
If we draw an analogy, camera interpolation is similar to binoculars. These devices enlarge the image, but do not make it look better or more detailed. So if interpolation is indicated in the phone's specifications, then the actual camera resolution may be lower than stated. It's not good or bad, it just is.
What is it for?
Interpolation was invented to increase the size of the image, nothing more. Now this is a ploy by marketers and manufacturers who are trying to sell a product. They indicate in large numbers on the advertising poster the resolution of the phone's camera and position it as an advantage or something good. Not only does resolution itself not affect the quality of photographs, but it can also be interpolated.
Literally 3-4 years ago, many manufacturers were chasing the number of megapixels and different ways tried to cram them into their smartphone sensors with as many sensors as possible. This is how smartphones with cameras with a resolution of 5, 8, 12, 15, 21 megapixels appeared. At the same time, they could take photographs like the cheapest point-and-shoot cameras, but when buyers saw the “18 MP camera” sticker, they immediately wanted to buy such a phone. With the advent of interpolation, it has become easier to sell such smartphones due to the ability to artificially add megapixels to the camera. Of course, photo quality began to improve over time, but certainly not because of resolution or interpolation, but because of natural progress in terms of sensor and software development.
Technical side
What is camera interpolation in a phone technically, since all the text above described only the basic idea?
Using special software, new pixels are “drawn” on the image. For example, to enlarge an image by 2 times, a new line is added after each line of pixels in the image. Each pixel in this new line is filled with a color. The fill color is calculated by a special algorithm. The very first way is to pour new line colors that the nearest pixels have. The result of such processing will be terrible, but this method requires a minimum of computational operations.
Most often, another method is used. That is, new rows of pixels are added to the original image. Each pixel is filled with a color, which in turn is calculated as the average of neighboring pixels. This method gives better results, but requires more computational operations.
Fortunately, modern mobile processors are fast, and in practice the user does not notice how the program edits the image, trying to artificially increase its size.
There are many advanced interpolation methods and algorithms that are constantly being improved: the boundaries of the transition between colors are improved, the lines become more accurate and clear. It doesn't matter how all these algorithms are built. The very idea of camera interpolation is banal and is unlikely to catch on in the near future. Interpolation cannot make an image more detailed, add new details, or improve it in any other way. Only in films does a small blurry picture become clear after applying a couple of filters. In practice this cannot happen.
Do you need interpolation?
Many users, out of ignorance, ask questions on various forums about how to do camera interpolation, believing that this will improve the quality of images. In fact, interpolation not only will not improve the quality of the picture, but may even make it worse, because new pixels will be added to the photos, and due to the not always accurate calculation of colors for filling, the photo may have undetailed areas and graininess. As a result, quality drops.
So interpolation in the phone is a marketing ploy that is completely unnecessary. It can increase not only the resolution of the photo, but also the cost of the smartphone itself. Don't fall for the tricks of sellers and manufacturers.
Camera interpolation is an artificial increase in image resolution. It is the image, not the matrix size. That is, this is special software, thanks to which an 8 megapixel image is interpolated to 13 megapixels or more (or less). To use an analogy, camera interpolation is like a magnifying glass or binoculars. These devices enlarge the image, but do not make it look better or more detailed. So if interpolation is indicated in the phone's specifications, then the actual camera resolution may be lower than stated. It's not good or bad, it just is.
Interpolation was invented to increase the size of the image, nothing more. Now this is a ploy by marketers and manufacturers who are trying to sell a product. They indicate in large numbers on the advertising poster the resolution of the phone's camera and position it as an advantage or something good. Not only does resolution itself not affect the quality of photographs, but it can also be interpolated.
Literally 3-4 years ago, many manufacturers were chasing the number of megapixels and in various ways tried to cram sensors with as many megapixels as possible into their smartphones. This is how smartphones with cameras with a resolution of 5, 8, 12, 15, 21 megapixels appeared. At the same time, they could take photographs like the cheapest point-and-shoot cameras, but when buyers saw the “18 MP camera” sticker, they immediately wanted to buy such a phone. With the advent of interpolation, it has become easier to sell such smartphones due to the ability to artificially add megapixels to the camera. Of course, photo quality began to improve over time, but certainly not because of resolution or interpolation, but because of natural progress in terms of sensor and software development.
What is camera interpolation in a phone technically, since all the text above described only the basic idea?
Using special software, new pixels are “drawn” on the image. For example, to enlarge an image by 2 times, a new line is added after each line of pixels in the image. Each pixel in this new line is filled with a color. The fill color is calculated by a special algorithm. The very first way is to fill the new line with the colors of the nearest pixels. The result of such processing will be terrible, but this method requires a minimum of computational operations.
Most often, another method is used. That is, new rows of pixels are added to the original image. Each pixel is filled with a color, which in turn is calculated as the average of neighboring pixels. This method gives better results, but requires more computational operations. Fortunately, modern mobile processors are fast, and in practice the user does not notice how the program edits the image, trying to artificially increase its size. smartphone camera interpolation There are many advanced interpolation methods and algorithms that are constantly being improved: the boundaries of the transition between colors are improved, the lines become more accurate and clear. It doesn't matter how all these algorithms are built. The very idea of camera interpolation is banal and is unlikely to catch on in the near future. Interpolation cannot make an image more detailed, add new details, or improve it in any other way. Only in films does a small blurry picture become clear after applying a couple of filters. In practice this cannot happen.
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The smartphone has an 8 MPix camera. What does interpolation up to 13 MPix mean?
Interpolation is a method of finding intermediate values
If all this is translated into a more human language, applicable to your question, you get the following:
- The software can process (enlarge, stretch)) files up to 13 MPIX.
Good day.
This means that your smartphone stretches a photo/image taken with an 8 MPix camera to 13 MPix. And this is done by moving the real pixels apart and inserting additional ones.
But, if you compare the quality of an image/photo taken at 13 MP and 8 MP with interpolation to 13, then the quality of the second will be noticeably worse.
To put it simply, when creating a photo, the smart processor adds its own pixels to the active pixels of the matrix, as if it calculates the picture and draws it to a size of 13 megapixels. The output is a matrix of 8 and a photo with a resolution of 13 megapixels. The quality doesn't improve much from this.
This means that the camera can take a photo up to 8 MPIX, but in software it can enlarge photos up to 12 MPIX. This means that it enlarges it programmatically, but the image does not become better quality, the image will still be exactly 8 MPIX. This is purely a trick of the manufacturer and such smartphones are more expensive.
This concept assumes that the camera of your device will still take photos at 8 MPIX, but now in software it is possible to increase it to 13 MPIX. At the same time, the quality does not become better. It's just that the space between the pixels gets clogged up, that's all.
This means that in your camera, as there were 8 MPIX, they remain the same - no more and no less, and everything else is a marketing ploy, a scientific fooling of the people in order to sell the product at a higher price and nothing more. This function is useless; during interpolation, the quality of the photo is lost.
This is now used all the time on Chinese smartphones, it’s just that a 13MP camera sensor is much more expensive than an 8MP one, that’s why they set it to 8MP, but the camera application stretches the resulting image, as a result, the quality of these 13MP ones will be noticeably worse if you look at the original resolution .
In my opinion, this function is of no use at all, since 8MP is quite enough for a smartphone; in principle, 3MP is enough for me, the main thing is that the camera itself is of high quality.
Camera interpolation is a trick of the manufacturer; it artificially inflates the price of a smartphone.
If you have an 8 MPIX camera, then it can take a corresponding picture; interpolation does not improve the quality of the photo, it simply increases the size of the photo to 13 megapixels.
The fact is that the real camera in such phones is 8 megapixels. But with the help of internal programs, images are stretched to 13 megapixels. In fact, it doesn't reach the actual 13 megapixels.
Megapixel interpolation is a software blurring of the image. Real pixels are moved apart, and additional ones are inserted between them, with the color of the average value from the colors moved apart. Nonsense, self-deception that no one needs. The quality doesn't improve.
Up to 13 MPix - this could be 8 real MPix, like yours. Or 5 real MPix. Software camera interpolates the camera's graphic output up to 13 MPix, not enhancing the image, but electronically enlarging it. Simply put, like a magnifying glass or binoculars. The quality doesn't change.
For several years now, manufacturers have been combining Cell phones with digital cameras. Such a camera is called digital because the image obtained with its help consists of dots, and the quality and quantity of these dots can be described in numbers, and therefore saved on modern digital media. Accordingly, the quality of a digital camera is usually determined by the maximum number of points in which the camera can save the resulting image. Of course, for professional separately made cameras, many other parameters are also important, such as the quality of the optics, the size of the light-sensitive matrix that directly receives an analog image from the lens, the operating principle of the matrix itself (CMOS, CCD) and much more. For cameras made in a phone body and without high-quality optics, with minimal matrix sizes and other similar minimization tricks, the main parameter remains the maximum number of points at which the camera can perceive an image from the lens. But many cameras can save an image in the phone’s memory in a higher resolution, this is called interpolation. During interpolation, the image obtained physically and realistically is enlarged programmatically to the dimensions declared by marketers. This operation can be performed on any computer, so the presence of such a function as interpolation is very doubtful in any not only phone, but also camera. So, choosing a phone with the most best camera, take the time to read the description of each device on the Internet so as not to run into an interpolation image.
Camera quality, or image size, is usually measured in megapixels. In our opinion it will be: millions of points. The more points the camera matrix can digitize an image, the better, in principle. All other factors being equal, we can assume that a 4 megapixel camera takes pictures, not 2, of course, there are other features, but somewhat better than a two megapixel camera. Although, it should be noted that there are cases when, with good optics, a high-quality matrix digitizes better than its low-quality multi-pixel counterpart.
Typically there are cameras of 0.3 megapixels (640x480), 1.3 megapixels (1280x960), 2 megapixels (1600x1200) and 4 megapixels (2304x1728). The lack of a normal flash and high-quality optics means that even a four-megapixel photo is not yet of good enough quality to print the image on photo paper. Flaws will be visible to the naked eye. However, with good natural (sun) lighting, a 1.3 megapixel camera is already capable of creating an image that, when printed on standard 10x15 size photo paper from an outstretched arm, will not differ from an image taken with a good camera.
Article provided by the site Mobile Life from Dolche-Mobile.Ru
Camera interpolation, why and what is it?
- Like an 8 megapixel matrix, and a 13 megapixel picture itself
- This is so as not to twist unnecessary wires to the matrix, megapixels are inflated directly in the process.
- This is when a pixel is split into several, so that when enlarged, the image does not appear in squares. Doesn't add real resolution. Smears the drawing.
- interpolation is finding an unknown value from known values.
the quality of interpolation in photography (approximation to the original) will depend on well-designed software - The camera sensor is 8MP, and the image is stretched to 13MP. Definitely turn it off. The photos will be 13MP, but the quality will be the same as 8MP (there will be more digital noise).
- The real resolution there is in lines per mm without blurring in any case at 2MP.
- Well, just bloated pixels
For example, many web cameras say that 720, etc. you look at the settings and there it is 240x320 - Interpolation - in a general sense - the use of a less complex function in the calculation in order to achieve a result as close as possible to the absolute one, achievable only with the help of the most accurate and correct actions.
In this version, simply put, programmers praise themselves for the fact that photographs taken with a phone differ slightly from those taken with more complex devices - cameras.
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